A108027 Numbers k such that 137*k + 139 is prime.

0, 12, 20, 26, 32, 54, 66, 92, 96, 104, 126, 132, 140, 144, 152, 174, 176, 180, 182, 186, 194, 200, 204, 210, 222, 230, 260, 264, 276, 284, 290, 302, 306, 336, 342, 360, 384, 390, 402, 404, 414, 416, 420, 480, 482, 486, 500, 510, 536, 546, 566, 570, 582, 584

Offset

1,2

Comments

137 and 139 are twin primes.

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Chris Caldwell, The First 1,008 Twin Primes.

Example

If k=104 then 137*k + 139 = 14387 (prime).

Maple

a:=proc(n) if isprime(137*n+139)=true then n else fi end: seq(a(n), n=0..700); # Emeric Deutsch

Mathematica

Select[Range[0, 600], PrimeQ[137#+139]&] (* Harvey P. Dale, Apr 03 2017 *)

Prog

(PARI) is(n)=isprime(137*n+139) \\ Charles R Greathouse IV, May 22 2017

Crossrefs

Sequence in context: A324332 A035511 A095035 * A090767 A117227 A360767

Adjacent sequences: A108024 A108025 A108026 * A108028 A108029 A108030

Keyword

nonn

Author

Parthasarathy Nambi, May 31 2005

Extensions

More terms from Emeric Deutsch, Jun 13 2005

Status

approved